Rudder arrangement for ships



June 1931. o. SCHULTZ RUDDER ARRANGEMENT FOR SHIPS Filed March 3, 1930Patented June 9, 1931 nsoen schema, or Hansen's, GERMAEY RUDDER- AR NGEMNT ronsmrs.

Application filed .Maroh .3, 19.80, .SeriallNo.

This invention relates to 'a steering device, which enables anexchanging of "the rudder to be easily eftecte'd.'S'nni'larar'rangements are known, which enable the exchanging Off '5the rudder without docking the vessel.

. These however areopen to the objection that in the case of fracture ofthe rudder spindle the broken rudder can only be removed with difficultywhich takes a considerable time,

-10 as the broken rudder'must for example be withdrawn at'the top.Moreover the inserting of the rudder when exchanging same is difficult.These disadvantages are overcome according to the invention in that astern- 1f, wedge, removable towards the rear and connected with alocking device, is provided and moreover the stern steering wheelmounted on the rudder spindle has a slot over which, v in the midshipposition of the rudder, the 29 gap freed by the pulling out of thesternwedge registers. Moreover the stern tube is open at the bottom andhas extensions the edges of which extend obliquely in down warddirection. e Owing to this arrangement it is possible, in the case ofbreakage of the spindle, to slide the rudder. provided with suitable cutout portions along the inclined edgeof the extensions until it comesinto the midship position and then drops into the water by gravity.

An embodimentof the invention is illustrated by way of example in theaccompany.- ing drawings in which:

Fig. 1 shows the stern in vertical section, the removed; stern-wedge andthe auxiliary devices shown in side elevation. i I

Fig. 2 is a top plan view of the stern fitted with the rudder and thelocking device.

Fig. 3 is a rear view of the stern tube with the rudder in operativeposition.

Fig. 4 is a side elevationof the driving mechanism, for the rudder.

Fig. 5 shows the stern tubein vertical giios's section together with therudderspin- The stern of the vessel is provided with astern wedge aadapted to be pushed out towards the rear, this stern wedge having arack b. The rack b meshes with a spur 'springcontrol led lever e of alocking device 432,876,, and in Germany August 3, 1929'.

wheel mounted' on a rotatable disc 0, the part of the stern wedgecarrying the rack being preferably moved in "a guide. "The rotatabledisc ohas a notch d, in which a 7 5E fengages, which lever canbeoperated either. a directly by hand or indirectly, mechanically. Whenopening the locking device, the stern edge-a be brought into theposition shown in- Fig. 1 byfturning the disc a so that a gap is formeddesigned to serve as passage for thefrudden. The stern steering wheelt'on the rudder spindle g has a slot 7L arranged so that it'regi'sters'with the gap I liberated the stern wedge a when the 1 rudderis the 'mi'dship position. The rudder spindle g has a finger adaptedtoenga g'eina notch Z inthe stern steering wheel A lrai-n drum an isprovided, according to the invention, with a flange n, adapted tov bearrested by means of a locking lever '0'. For this purpose the "lockinglever o is hingedly mounted. and has a catchy? which, when-the lever ais qthrownflover andrt-he steering wheel 9' is operated,{sl-ides on thedrum flangegm until it drops into a not-ch in the *fian'ge,corresponding to the midship position of the rudder. 'The" iconne'cti-onbetween the chain-drum m andthe stern steering wh e1 i is effected bymeans of a c lia-in 1" known perise. J

In order to avoid-the'lossesfrom'friction when steering, the ,lower,open end of the] stern tube s lying in the water has guide p Z barslt.stern tube has further tubular 85 projections 'w' open towards therear,1bor'- I dered vvi*t h downwardly extending inclined edges, so thatin the case of breakage of the rudderspindla'the rudder part situated inany rudder'yangle is, positively guided the upper edges of suitable cutout portrons provided in the rudder back piece alon'g' the inclinedupper edge of the projections at and falis out at the bottom from thestern tube. "The exchanging of the upper 95 part "of "the rudder spindlecan be' effected by means of a lifting tackle or "elevator fitted'on themast; When exchanging the steering rudder, owingto breakage of any ikind, more particularly a fracture ot the rudder spindle, the operationis as follows: After the lower portion of the rudder standing at anyangle is positively guided,

I directly after the breakage of the rudder I that the lever e isdepressed with the foot or by means of a suitable device adapted to beoperated by the helmsman. After having been unlocked the disc 0 isrotated, so thatthe stern Wedge a with the rack Z2 is pushed out of thehull of the ship to the rear by means of the spur wheel rigidlyconnected with" the disc 0 (see Fi l and the stern wedge shown in dotdash position in Fig. 2) After the pulling outoi the stern wedge 0: agap is formed in the stern, the slot h of the stern steering Wheel ibeing situated above this gap, so that after the removal of the upperbroken off portion of the rudder spindle, a spare rudder can beintroduced After the introduction of the new steering rudder, the disc 0is turned back, the pushed out stern wedge a being thereby returned intoits initial position. The lever act the steering apparatus is thenthrown off (see Fig, 4:) and the vessel is'againready for travelling.

I claim z i 1. A rudder arrangement on ships in which the steeringrudder can be exchanged while the vessel is floating, comprising incombination a stern wedgeadapted to be pushed out towards the rear informing a gap for the introduction of'a fresh rudder, a locking deviceadapted to hold said stern 'wedge in the closing position, and a sternsteering wheel mounted on the rudder tube having -a slot adapted toregister with the gap producedby the pushed out stern wedge when therudder is in midship position.

2. A rudder arrangement asspecified in claim 1, comprising incombination a chain drum, a locking lever adapted to lock said drum, aflange on said drum having a notch,

and a catch on said lever adapted to slide on. said flange and to engagein said notch when the rudder is in the midship position.

3. A rudderarrangement as specified in claim 1, comprising incombination with the stern wedge, a rack mounted on said stern wedge, atoothed wheel engaging in said rack, and a rotatable disc, carrying saictoothed wheel. 1 r

4. A rudder arrangement as specified in claim 1, comprisingincombination a retatable disc having a notch, and a spring controlledlocking lever adapted to engage in said notch.

5. A rudder arrangement as specified in claim 1, comprising incombination with the rudder spindle, a stern tube open towards the rearadapted to receive said spindle, a guide bar insaid stern tube adaptedto reduce the friction of said spindle, tubular projections, opentowards the rear arranged on the lower end of said tube in the water theupper edges of said projections inclined towards the rear adapted topositively guide in the event of a rudder spindle fracture the rudderpart in standing at any angle by means of the inclined upper edges ofcut out portions in the back of said rudder so that the rudder canfallout through the bottom end of said stern tube.

In testimony whereof I affix my signature.

OSCAR SCHULTZ.

